University of Nebraska - Lincoln. Cooperative Extension.

University of Nebraska - Lincoln. Cooperative Extension.

University of Nebraska - Lincoln. Cooperative Extension.

USDA. APHIS. Plant Protection and Quarantine.

Includes species listed as a Federal Noxious Weed under the Plant Protection Act, which makes it illegal in the U.S. to import or transport between states without a permit.

USDA. Animal and Plant Health Inspection Service.

PPQ conducts weed risk assessments (WRA) as part of its process for safeguarding U.S. agriculture and natural resources from weeds and invasive plants. A weed risk assessment is a science-based evaluation of the potential of a plant species to establish, spread, and cause harm in the United States. PPQ may initiate an assessment for any number of reasons, including: evaluation of commodity import requests, detection of a new weed in the United States, and petitions for listing from stakeholders.

Pennsylvania Department of Agriculture.

Oregon State University. National Pesticide Information Center (NPIC).

Through its county agents, the Cooperative Extension Service gives individuals access to the resources at land-grant universities across the nation. These universities are centers for research in many subjects, including entomology (the study of insects) and agriculture. Each county within the United States has an Extension office, which is staffed with agents who work closely with university-based Extension specialists to deliver answers to your questions about gardening, agriculture, and pest control.

Oregon State University. National Pesticide Information Center (NPIC).

Whether your pest is a weed, insect, animal, microbe, or another organism, correct identification of your pest makes controlling it easier and often more effective.

Oregon State University. National Pesticide Information Center (NPIC).

USDA. Natural Resources Conservation Service.

NRCS offers technical and financial assistance to help farmers, ranchers and forest managers.

USDA. Natural Resources Conservation Service.

New South Wales Department of Primary Industries (Australia).

New South Wales Department of Primary Industries (Australia).

New South Wales Department of Primary Industries (Australia).

New South Wales Department of Primary Industries (Australia).

New South Wales Department of Primary Industries (Australia).

New South Wales Department of Primary Industries (Australia).

New South Wales Department of Primary Industries (Australia).

New South Wales Department of Primary Industries (Australia).

New South Wales Department of Primary Industries (Australia).